Daya Bay Neutrino Experiment Collaboration Group won another award

On April 24, the High Energy and Particle Physics Branch of the European Physical Society announced that the Daya Bay Neutrino Experiment Cooperative Group and the Korea Neutrino Experiment Cooperation Group, hosted by the Institute of High Energy Physics of the Chinese Academy of Sciences, won the 2023 European Physical Society High Energy and Particle Physics Award. The award ceremony will take place on August 21 at the European Physical Society High Energy Physics Conference in Hamburg, Germany.

The Prize is the highest prize in high-energy and particle physics of the European Physical Society and was created in 1989 and is awarded every two years to individuals or collaborative groups that have made outstanding contributions to experimental, theoretical or technical fields in high-energy physics. Among the 17 previous awards, a total of 34 individuals and 6 experimental cooperative groups have been awarded, including 12 Nobel laureates in physics.

The reason for the award of the Daya Bay Cooperation Group and the Korean RENO Cooperation Group was “the discovery of the disappearance of electronic antineutrinos in short-baseline reactors, and the first measurement of neutrino mixing angle θ13, paving the way for detecting the charge-universe breaking of leptons.” Sharing the same prize was Swedish scientist Cecilia Jarlskog for “the discovery of invariants describing the failure of quark and lepton charge-symmetry.”

On March 8, 2012, Daya Bay Experiment announced the discovery of a new pattern of neutrino oscillation, and measured the corresponding mixing angle θ13, and the measurement results were confirmed by the RENO experiment in South Korea a month later. The discovery is of great significance for understanding the complete picture of neutrino oscillations, understanding the “mystery of antimatter disappearance” in the universe, finding and identifying cosmology and new physical models, and determining the future development direction of neutrino research.

The achievement has previously won more than 20 important awards at home and abroad, including the Panovsky Prize, the highest prize for particle physics experiments of the American Physical Society, the “Breakthrough Award in Fundamental Physics” in the United States, the “Nikkei Asian Award” in Japan, the “Pontykov Prize” in Russia, the first prize of National Natural Science, and the “Future Science Award”.

On April 21, Daya Bay Experiment published its latest paper in Physical Review Letters, which greatly improved the measurement accuracy of θ13 again. The Daya Bay experiment also carried out a series of accurate measurements on the neutrino energy spectrum of the reactor, and found the anomaly of the energy spectrum; The existence of inert neutrinos is basically excluded in a wide range of energy regions.

Wang Yifang, director of the Institute of High Energy of the Chinese Academy of Sciences and academician of the Chinese Academy of Sciences, introduced that the Daya Bay experimental device was retired on December 12, 2020, and its next-generation device, the Jiangmen Neutrino Experiment, began construction in 2015, and is expected to complete the construction of the device this year, which will make internationally leading major achievements in determining the neutrino mass sequence, accurately measuring oscillation parameters, and studying astroneutrino physics. (Source: Ni Sijie, China Science News)

Daya Bay neutrino experiment before retirement. Photo courtesy of the Institute of High Energy of the Chinese Academy of Sciences

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